Vintage Electronic Calculators:

Overview of Brands


ROYAL: 91K (version-1)
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AKA (Label): MODEL UA 122, Product number (P/N): UA120 (UA 120),
Keywords/Tags: UA120 (UA 120) | UA122 (UA 122) | 91K
Date of intro: ~feb-1976, Origin: Japan (List), Dimensions: 114x70mm,
Power: 6V: (AAA x4),
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 24, #Key-Black: 10, #Key-Blue: 3, #Key-White: 11,
Keyboard Array (Rows x Columns): 05x05,
Decimal switch: [F-2-3], Miscellaneous switch: [(Blank)-(Sigma) on-off],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Related with: ROYAL_docu: (Ad.) *: The keys to buying the right calculator (version-1); ROYAL_docu: (Instr.) 91K; ROYAL_docu: (Ad.) *: The keys to buying the right calculator (version-2); ROYAL_parts: (Box) 91K,
Resemblance with: IMPERIAL: 91K; PRECISA: M201, (Resemblance 033), Made by: OMRON (List of all Import-OEM-models for ROYAL),
Serie-members: ROYAL: 91K (version-1) (Black); ROYAL: 91K (version-2) (Beige),
Known Serial-numbers: 91K00359 (91K 003059) | 91K019483a (91K 019483 (a)) | 91K037456a (91K 037456 (a)) | 91K045766a (91K 045766 (a)) | 91K060587a (91K 060587 (a)) | 91K69211608 (91K 69.211.608) | 91K69214958 (91K 69.214.958) | 91K69218033 (91K 69.218.033) (List of all S/Ns from ROYAL)
Collector value: 7/10,


Label, name plate / Battery compartment / Bottom
S/N: 91K69214958 (91K 69.214.958)

Created: 27-jun-2013, Manual-update: 09-apr-2023, Batch-update: 26-feb-2024             

# Pageloads since 2018: 61             

2 Pic(s),


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